Implement-joint



(No Model.)

F. H. RICHARDS.

IMPLEMENT JOINT.

No. 397,389. Patented Feb. 5, 1889.

N. PETERs, Plwwumo n nor. wnhin mn, 0.1:.

FRANCIS H. RICHARDS, OF HARTFORD, CONNECTICUT.

IMPLEMENT-JOINT.

SPECIFICATION forming part of Letters Patent No. 397,389, dated February 5, 1889.

Application filed July 6, 1888. Serial No. 279,237. (No model.)

To all whom it may concern:

Be it known that I, FRANCIS H. RICHARDS, a citizen of the United States, residing at Hart-ford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Implement- Joints, of which the following is a specification.

This invention relates to joints for pliers and other tools of that class, in which the two members should be rigidly held together, yet free to move about a common axis, one with respect of the other. Tools or implements of this class comprise cutting and punching nippers, button-settin instruments, and the like, in which the j aws or dies should have an ac curate and permanent alignment one with the other. 7

In the drawings accompanying and forming a part of this specification, Figure 1 is a side elevation of a plier having a joint embodying my presentimproven'lents. Fi 2 is a section through the joint in line a (1.,I ig. 1.

Similar characters designate like parts 'in both the figures.

The plier shown in the drawin consists, as usual, of two members, A B, pivoted together and provided with the jaws 2 and 3, respectively. Thej aws, however, may be constructed to carry cutting or punchin tools or the operative parts of a button-setting instrument. This latter adaptation is shown in my application, Serial No. 276,099.

The handle A is shown having a groove, 50, Fig. 2, into which is fitted the projecting ring or track 51, formed on handle I3. The

bolt 52, passing through both handles and held in place by check-nut '53, serves to firmly hold together the two parts A I). The said bolt should be fitted freely in the member A, as shown by spaces 20 21, and is preferably screwed into and through member B. The bearing then comes on the under side, 22, of the screw-head, so that the usual slight eccentricity and inaccuracy of the screw-body is not objectionable as being preventive of accurate operation. The construction de scribed permits the use of the check-nut, whereby the bolt is rigidly fixed in said member B, and this latter arrangement secures the freedom of movement required of the member A without binding the same on the track 51, and also without having undue play between the said i'nembers.

Having thus described my invention, I claim- 1. The implement-joint herein described, consisting of two members pivotally connected and having a central bolt uniting them together, one mcnnber having a groove and the other member a raised track fitting into said groove, the groove and track being circular and concentric to said bolt, all substanti ally as described.

2. The implement-jointherein described, consisting of the members A B, having, respectively, the groove 50 and track 51 and bored to receive the bolt 52, combined with the bolt 52, turning freely in the one member and screwed into the other, and having the checknut, all substantially as shown and described.

IJRANCIS II. RICHARDS. Witnesses:

HENRY L. RICKARD, DARIEN W. DODSON. 

